Remove GL-specific code from GMs and tests

src/gpu/GrGpu.h

Index: src/gpu/GrGpu.h
diff --git a/src/gpu/GrGpu.h b/src/gpu/GrGpu.h
index 8d449b7606351511367888e77c99ad6d5565ebc1..5c9e90ba27f84869b5018ba517f7c0c192221cbc 100644
--- a/src/gpu/GrGpu.h
+++ b/src/gpu/GrGpu.h
@@ -362,10 +362,16 @@ public:
     void saveActiveTraceMarkers();
     void restoreActiveTraceMarkers();
 
+    // creation and deletion of raw texture for testing
+    virtual GrBackendObject createBackendTexture(void* pixels, int w, int h,
+                                                 GrPixelConfig config) const = 0;
+    virtual bool isBackendTexture(GrBackendObject id) const = 0;
+    virtual void deleteBackendTexture(GrBackendObject id) const = 0;
+
     // Given a rt, find or create a stencil buffer and attach it
     bool attachStencilAttachmentToRenderTarget(GrRenderTarget* target);
 
-    // This is only to be used in tests.
+    // This is only to be used in GL-specific tests.
     virtual const GrGLContext* glContextForTesting() const { return NULL; }
 
 protected: